Milling-machine feed mechanism.



C. D. OESTERLEIN.

MiLLING MACHINE FEED MECHANISM.

APPLICATION FILED FEB. 1. I915.

Patented May 4, 1915.

2 SHEETSSHEET I.

Witnesses: WM 6?,

I Inventor 20M 6 M; Attorfi'fi-y C. D. ()ESTERLEIN.

MlLLING MACHtNE FEED MECHANISM.

APPLICAHON HLED FEB. l. 19I5.

Patented May 4, 1915.

Z SHEETS-SHET 2 [hdf/d 1, 41% fer/L91 Witriesses:

Inventor Attorney UNITED STATES PATENT OFFICE.

CHARLES D. OESTERLEIN,OF CINCINNATI, OHIO, ASSIGNOR TO THE OESTEELEIN MACHINE COIdPANY, OF CINCINNATI, OHIO.

MILLING-MACHINE FEED MECHANISM.

Specification of Letters Patent.

Patented May 4, 1915.

Application fied February 1, 1915. Serial No. 5,387.

To all whom it may concern Be it known that I, CHARLES D.' OESTER LEIN, a citizen of the United States, residing at Cincinnati, Hamilton county, 'Ohi o; have 'invented certain new and useful Improvements in Milling-Machine Feed Mechanism, of which the following is a specification.

This invention, pertaining to milling machine feed mechanism, relates to a construction aiming at peculiarly convenientaccessories enabling' the operator to quickly changefrom a slow feed for the cutting operation to a fleeting advance in the direction of the cutting feed for passing p'a'rtsuof-the 5 work which require no cutting,- r toquickly change from the slow orquick'movement of the work in the. feeding direction to afleeting return in theopposite-direct-i'om The invention will bereadily'unders'tood from the followirlg'desription taken in-Con- I nection withthe accompany i'ngi drawingsfin ii n ia iga i housing ofthcathro'wing' p] I .yert section, in the pix; e' -'';Figs,,3fan'd 4: f"

In F'tllfi drawings.: 1, 1nfi lumnariframe of a milling macln known type: f2, the arbor-pf? .theiknee' monnted for tf'crticala just the framezd th e saddle m 1d,

- justment 'in' and-onion the work holding titble mount-edffor;inovcn 1 inner end of sleeve 11, opposite theclu h:-

hnb'on gear 9, there being cq-y iderab V between the, two cln'tchhubs, cli1tche sof the'two- .hu'bs facing in i "directionzf-l, theclutcH-membersphn and-13 =--1 -5,,.a eiefdriv n igbman "source power, preferably from u") in-g part of the ma chine,iand adap .1-l.;:- '18", an arm faston shaft 16 andadjapted,"

"extending" across it .flOl'IlisSldQ. jtOhSld v I pair-of treadles, one on each side of; th m'achine, fast'attheir rear ends on shaft lfland eaten-ding forwardly below [med-{near the base of "the I universal joint connection with that end of tumbling shaft '7 opposite the end which is connected with shaft 6, shaft 7 being of telescopic character to compensate for the di-' verse vertical positions of the knee.

. All of the above-mentronedparts are, or

-may be, of usual construction and subject to usual modifications. Shaft 8, being driven by power, transmits motion to shaft 6 which, in turn, transmits motion to the feed mechanism carried by the knee to cause the work-holding tableto niove slowly in the feedingdirection to advance the work to the cutter,.reversing mechanism being-inter.- posed between shaft 6 and the feeding, devices of the table so that the table maybe i caused to move .in either direction, all as usual'in this class of machines.

Proceeding with the drawings i-ndit cates a'geanloose on shaftv 8-an'd positively 76 driven at slow speed bysom'e rotating part of, the machine, the same. as such gent-is sleeve. looseon shaft 8:;12, apirlley, V sleeve 11:13, a clutch-hub or head. n' th '3 end ,ad aptedg to slide, into mcnt 'with eithez'=" of the c1 chi-m .mbe

tine-pulley 12: aim much higher r'ate Ft anth'at of'g'ear 9: 1'6, a shaft suppo-rt edby 1 I the frame-ofthe. machine .at right" g sl-f de: 17, a.clutch -f0rk fast-on s haft lfi andengaging-sliding clutch-14 and adapted, by oscillatory adjustment, :to throwf the [clutch into engagement 'either withe the chitchon gear S) or'withthecln'tohaon'sleeve by its oscillatio1is,:to give'motfion to the 1 clutch-fork and shift the clutch: 19,- a shaft journaled in the [frame I of the machine and ll; i pperl end hein dle carried by the level of the lower end of arm 18: 22,'a rod piyoted at its opposite end to arms 18 and 21, with lost motion atits connection with arm 18: 23, a fixed part of the machine frame, surrounding rod 22: 24, a spring surrounding rod 22-and normally under compression between fixed part 23 and -a collar fast onlthe r'od.;-25, a casing secured to the outside of the frame of the machine and furnishing bearings for shafts 8 and 16 and an inclosure for the' clutch mechanism: 26, an arm projecting upwardly from arm 18 and' provided at its upper end with a triangular tooth: 27, a vertically sliding spring-plunger supported by the casing over arm. 26 and having an-zangular tooth cooperating with the tooth on arm 26: and 28, the usual hanthe knee and serving as a means by which'the reverse gearing of the knee may be shifted when it' is desired to change the direction of the feeding motion.

Looking at Fig. 1 the continuous rotation of shaft 8 causes the continuous rotation of shaft 6 and the feeding mechanism conn cted with the shaft 6, while the telescopic and universal-jointed character of shaft 7 permits of the transmission of motion from shaft 8 to the mechanism of the knee in ang, I position of yert-ioal adjustment of the knee,

the direction of motion of the feed of the table determined by the reverse mechanisrrt carr ed by the knee and controlled by handle 28, all as usual in milling machines of this general type. It will be understood by those familiar with this type of milling machines, that it is customary in machines of this type to transmit the motion to shaft 8 through the medium of a so-called speedbox to permit of the rate of feed being adjusted, shaft 8, however, rotating constantly in one direction", whatever be its rate of speed, which rate of speed will always be alow rate appropriate to the feeding of the work to the cutter. If gear 9 were fast on shaft 8 the above-mentioned usual performance of the feeding mechanism would be realized. In the present case, however, gear 9 is loose on Shilfzt 8, spring 24 keeping the sliding clutch inlnormal engagement with gear 9, the normal effect being therefore the same as if gear 9 were fast on shaft 8. The

spring, in holding the clutch into normal engagement with gear 9 also holds the trcadles in elevated position. If, now, it he desired to give to the table a fleeting motion, it is only necessary to depress either treadle which depression results in disengaging the slidingclutchfrorn gear 9 and throwing; it into engagement with the sleeve ,driven sat comparatively highzspced by pulley 12, the

clutch returningto ,condition for slow feed ing motion the instant the treadlejsieleased, Spring 24 will, when permittedbo the foot act quick enou to instantly corn throw the chitc from the abnormal fast to the normally slow clutch-member without there being any dwelling of the sliding clutch in idle neutral position, and without serious liability for the damaging of impartially engaged clutch teeth. The'work an, in depressing the treadle to shift the ciiitch from the low to the high speed could. with proper energy and care. shift the clutch to the fast condition without incompletely engaging the clutch. But, if the workman fails in promptness or completion of action on the treadle, springplunger 27 will quickly and completely throw the clutch farther than his carelessly employed foot might do, the lost motion connection between rod 22 and lever 18 permitting this action, and the treadle, while depressed, serving to hold the sliding clutch in engagement with the clutch of the sleeve. Owing to thedua character of the treadle, which straddles the frame of the machine, the workman may operate the treadle with the foot best available in connection with his position at the machine.

Iclaim: p

Milling maohinefe'ed mechanism compris ing, a vertically adjustable knee, a work holding table mounted for movement thereon, a shaft journaldinthe knee for giving traversing motion tothe work-holding table, a fixed shaft journaledbn the frame of the machine, a telescopic shaft connected to said knee shaft and fixed shaft by universal joints, a gear loose on said-fixed shaft and adapted for continuous rotation, a pulley loose on said fixed shaft and adapted for rotation in the same direction as said gear but at higher speed, clutchmembers conneoted with said gear and pulley, a clutch member splined on said fixed shaft and adapted to, lock either the gear or the pulley to the shaft, a clutch-throwing armcom nected with said splined clutch-member and adapted for shifting that 'clutch-member,' a treadle pivoted to the frame of the machine a. rod connecting said trcadle with clutch-throwing arm, and a spring acting between a fixed portion of the frame of the" 

